The update fixed it! Must have been some issue with the beta version of macOS. Thank you for all your help! And now I know about the verbose information window.
Here's the info from that window. I had no idea it existed:
16:01:39.972 (loader): Teensy Loader 1.45, begin program
16:01:40.005 (loader): Unable to listen for remote control
16:01:40.005 (loader): initialized, showing main window
16:01:40.259 (loader): HID/macos: no devices found
16:01:45.939...
There are no additional security measures. I have even tried turning off macOS's firewall and uploading, and still it won't work. I'm running a beta version of 10.14.3, so maybe that's it. I'll try updating and report back.
Another thing to note is it did work for one program a few days ago...
I recently got a teensy for a project. When I go to install any program, I get the following error:
Unable find Teensy Loader. (p) Is the Teensy Loader application running?
quitexit status 1
Error compiling for board Teensy 3.5.
The Teensy Loader application is running because Arduino opened...
NOTE: MOVED TO "TECHNICAL SUPPORT & QUESTIONS" WHERE IT BELONGS
I recently got a teensy for a project. When I go to install any program, I get the following error:
Unable find Teensy Loader. (p) Is the Teensy Loader application running?
quitexit status 1
Error compiling for board Teensy 3.5...